Python – 检查列表元素的元素索引是否相等

给定两个列表和检查列表，测试检查列表中的每个元素是否在两个列表中的相似索引中出现。

Input : test_list1 = [2, 6, 9, 7, 8], test_list2 = [2, 7, 9, 4, 8], check_list = [9, 8, 7]
Output : False
Explanation : 7 is at 4th and 2nd place in both list, hence False.

Input : test_list1 = [2, 6, 9, 7, 8], test_list2 = [2, 6, 9, 4, 8], check_list = [9, 8, 6]
Output : True
Explanation : All from checklist at similar index, hence True.

方法#1：使用循环

在此，我们迭代列表中的所有元素，如果元素不同并且存在于检查列表中，则返回 False。

Python3

# Python3 code to demonstrate working of 
# Check if elements index are equal for list elements
# Using loop
  
# initializing lists
test_list1 = [2, 6, 9, 7, 8]
test_list2 = [2, 7, 9, 4, 8]
  
# printing original lists
print("The original list 1 : " + str(test_list1))
print("The original list 2 : " + str(test_list2))
  
# initializing check_list
check_list = [9, 8, 2]
  
res = True 
for idx, ele in enumerate(test_list1):
      
    # check for indifference and containment
    if test_list1[idx] != test_list2[idx] and ele in check_list:
        res = False 
        break
      
# printing result 
print("Are elements at same index for required instances ?:  " + str(res))

输出

The original list 1 : [2, 6, 9, 7, 8]
The original list 2 : [2, 7, 9, 4, 8]
Are elements at same index for required instances ?:  True

方法 #2：使用 zip() + all() + 生成器表达式

在此，我们使用 zip() 对类似索引进行配对，然后使用 all() 检查所有索引，生成器表达式用于迭代逻辑。

Python3

# Python3 code to demonstrate working of 
# Check if elements index are equal for list elements
# Using zip() + all() + generator expression
  
# initializing lists
test_list1 = [2, 6, 9, 7, 8]
test_list2 = [2, 7, 9, 4, 8]
  
# printing original lists
print("The original list 1 : " + str(test_list1))
print("The original list 2 : " + str(test_list2))
  
# initializing check_list
check_list = [9, 8, 2]
  
# checking for all elements equal in check list using all()
res = all(a == b for a, b in zip(test_list1, test_list2) if a in check_list)
      
# printing result 
print("Are elements at same index for required instances ?:  " + str(res))

输出

The original list 1 : [2, 6, 9, 7, 8]
The original list 2 : [2, 7, 9, 4, 8]
Are elements at same index for required instances ?:  True